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13_plntry_frmtn - MIT OpenCourseWare http/ocw.mit.edu...

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MIT OpenCourseWare http://ocw.mit.edu 12.001 Introduction to Geology Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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L. T. Elkins-Tanton Mars Fundamental Research Program The effects of magma ocean depth and initial composition on planetary differentiation (Image courtesy of NASA/JPL.)
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Formation of new stars and planets protoplanetary nebula = planetary nebula = preplanetary nebula, NEBULAS, not new SOLAR SYSTEMS protoplanetary disk = proplyd accretionary disk (this really refers just to the star) Horsehead nebula: NASA, NOAO, ESA and The Hubble Heritage Team (STScI/AURA) Eagle nebula: Hester, Scowen (ASU), HST, NASA
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